HAERDEN JOHANNES has a total of 11 patent applications. Its first patent ever was published in 1904. It filed its patents most often in United Kingdom, Austria and United States. Its main competitors in its focus markets electrical machinery and energy, materials and metallurgy and thermal processes are IMBERT PROCESS COMPANY, UPTON ELECTRIC FURNACE COMPANY and ELECTROMETALLURGIQUE DE MONTRI.
# | Country | Total Patents | |
---|---|---|---|
#1 | United Kingdom | 9 | |
#2 | Austria | 1 | |
#3 | United States | 1 |
# | Industry | |
---|---|---|
#1 | Electrical machinery and energy | |
#2 | Materials and metallurgy | |
#3 | Thermal processes |
# | Technology | |
---|---|---|
#1 | Special electric heating or lighting | |
#2 | Metal production and refining | |
#3 | Furnaces | |
#4 | Non-metallic elements | |
#5 | Details of furnaces |
# | Name | Total Patents |
---|---|---|
#1 | Haerden Johannes | 11 |
#2 | Tillquist Theodor | 1 |
Publication | Filing date | Title |
---|---|---|
GB191407452A | Improvements relating to the Manufacture of Hollow Steel Bars. | |
GB191400570A | Improvements relating to Electric Induction Furnaces. | |
GB191125681A | Improvements relating to the Production of Hydrogen Peroxide. | |
GB191009897A | Improvements relating to Electric Furnaces. | |
GB191007303A | Improvements relating to the Reduction of Metals from their Oxides or other Compounds. | |
GB191003739A | Improvements in or relating to Metallurgical Furnaces. | |
GB190926251A | Improvements in and relating to Electric Furnaces. | |
US977303A | Electric furnace. | |
GB190426919A | Improvements in Arc Light Electrodes | |
GB190426918A | Improvements in Arc Lamps and Electrodes therefor |